func CreateMountPoint(rootPath string, mntPath string) error {
	_, err := os.Stat(mntPath)
	if err != nil && os.IsNotExist(err) {
		err := os.MkdirAll(mntPath, os.ModePerm)
		if err != nil {
			logrus.Errorf("mkdir mnt path, err: %v", err)
			return err
		}
	}

	dirs := fmt.Sprintf("dirs=%s%s:%s%s", rootPath, common.WriteLayer, rootPath, common.BusyBox)
	cmd := exec.Command("mount", "-t", "aufs", "-o", dirs, "none", mntPath)
	if err := cmd.Run(); err != nil {
		logrus.Errorf("mnt cmd run, err: %v", err)
		return err
	}
	return nil
}
